We all know by now that macOS Big Sur is the latest and greatest version of Apple’s Mac operating system. It was released in November 2020 and offered some serious advancements, especially on the visual side. If you have an older machine, though, you may be wondering whether your Mac is compatible. Let’s shed some light on macOS Big Sur system requirements and help you check whether your Mac supports the new OS.
- Today I will show you how to Install macOS 11 Big Sur on an Unsupported Mac. To be clear this guide shows you how to install Mac OS Big Sur, it is up to you.
- Aug 13, 2021 Once you have taken a backup follow the instructions below to install macOS Big Sur on your unsupported Mac. Step 1: First you need to download two files from the links below to complete the macOS 11 Big Sur installation on your unsupported Mac. MacOS Big Sur PKG installer: https://developer.apple.com/macos/.
- How to install Big Sur on unsupported Mac To install Big Sur on an unsupported Mac, you must first create a bootable USB drive using a special patcher app. Then you need to use the USB drive to install Big Sur on the unsupported Mac, and, lastly, you must install the needed patches. Creating a bootable USB stick using the Big Sur patcher.
- MacOS Big Sur on unsupported Mac I'm having an old MacBook Air 4.2, (mid 2011, SSD, 4 Gb memory), which have been running Catalina for quite some time despite that the max OS is High Sierra. I have been using the great work by dosedudes1 and his Catalina patcher.
Install Big Sur On Older Mac
Before you attempt to upgrade to Big Sur
There are a couple of things you should do before you upgrade to Big Sur.
Mac Hardware Requirements. For details about your Mac model, click the Apple icon at the top left of your screen and choose About This Mac. These Mac models are compatible with macOS Big Sur: MacBook (2015 or later) MacBook Air (2013 or later) MacBook Pro (Late 2013 or later) Mac mini (2014 or later) iMac (2014 or later) iMac Pro (2017 or later).
- Back up your Mac.
It doesn’t matter whether you use Time Machine or a third-party backup tool, just make sure you backup your Mac immediately before you upgrade.
Mac Os Big Sur Problems
- Free up some space for the new OS
To get macOS Big Sur running on your Mac, you need at least 20GB of free space. So, if you aren’t sure you have enough, here’s how to check it. Click the Apple menu and select About This Mac. Go to the Storage tab to let your Mac calculate the amount of free space. If you don’t have enough, you can try removing some old junk with CleanMyMac X. This app detects ancient cache, user log files, and other clutter and helps you delete it from your Mac.
- Download the free version of CleanMyMac X and install it, then launch.
- Press Scan.
- Click Run.
That’s all there is to it. I managed to clear 10GB in just a couple of minutes, which saved me hours I would have spent if I were to do it manually.
macOS Big Sur requirements
Here’s the list of macOS Big Sur supported Macs:
- Any Mac Pro or iMac Pro
- MacBook Pro and MacBook Air 2013 and later
- iMac and Mac mini 2014 and later
- MacBook 2015 and later
As you can see, some Macs released as long ago as 2013 can officially run Big Sur. That’s pretty good considering the number of macOS updates there have been since then and the new features they have introduced.
Sadly, a few machines that were supported to upgrade to Catalina have fallen off the list for Big Sur, notably the 2012 MacBook Pro, MacBook Air, and iMac.
Mac Mini 2012 Big Sur
Mac models that do crash
Immediately after Big Sur's release on November 13, 2020, Mac users started reporting system failures that appeared to affect MacBooks from 2013-2014. The attempted installation resulted in 'bricking some older MacBook Pro models,' according to MacRumors. Notably, those MacBooks are the oldest still supported Macs that can run Big Sur. So if your MacBook belongs to that generation, we advice you to do little research on this before you rush to install Big Sur.
macOS Big Sur compatibility
If your Mac’s model is on the list of “officially supported” Macs to run Big Sur, you will definitely be able to upgrade it to the latest OS. You can be sure the installer will run on your Mac and that if you run into trouble, you can expect help from Apple, either in the form of support documentation or an update to the OS.
But, if your Mac is slightly older and isn’t on the list, there is a possibility you can still update it to Big Sur. Several Mac users have had some success installing the Big Sur beta on Macs that aren’t on Apple’s list. It requires a workaround, and there’s no guarantee that it will continue to work when the final version of Big Sur is released or when updates are issued. But, if you’re determined to install Big Sur on an older Mac, or you want to try it as a fun project, it’s an option.
Things to consider before you try to install Big Sur on an unsupported Mac
Installing macOS Big Sur on a Mac that’s not on Apple’s official list of unsupported Macs isn’t as straightforward as just downloading the installer and running it. How you install it will depend on the Mac you’re trying to install it on, and we’ll come to that later in the article. But there are other things you need to consider.
- Your Mac may not run at all afterwards.
If you get the installation process wrong or something just doesn’t work as it should, you could be left with a Mac that doesn’t boot. For that reason, you should make a bootable clone of your startup drive before you start.
- Even if your Mac boots, parts of it won’t work
Among those users who successfully installed the beta version of Big Sur on unsupported Macs, most reported that either the graphics system (GPU) didn’t work or that Wi-Fi didn’t work. You can get around the wifi issue by replacing the internal Wi-Fi card or using a USB Wi-Fi adaptor, but you can’t replace the GPU.
- There’s no guarantee updates will work
Just as you can’t use the regular installer to install Big Sur on an unsupported Mac, you won’t be able to install updates using Software Update. That could leave you vulnerable to security flaws.
How to upgrade to Big Sur on an unsupported Mac
As we said earlier, the specifics of how you install Big Sur on an older Mac vary according to the Mac, but there are lots of success stories in this thread.
One example is the user who installed the Big Sur beta on a 2012 15in MacBook Pro, and it ran well apart from Wi-Fi not working. That user got around the problem by using an iPhone as a hotspot (you can use Personal Hotspot by connecting to an iPhone via Bluetooth or USB). Another user reported installing Big Sur on a 2012 Mac mini, but with sound and Wi-Fi not working.
The question of whether or not your Mac is compatible with macOS Big Sur can’t be answered just by looking at Apple’s list of supported Macs. Those are the machines on which Apple has decided to support installation, but there are others on which Big Sur will run, albeit with a bit of extra work. You should decide for yourself whether you want to take risks associated with installing Big Sur on an unsupported Mac. And, if you decide to go ahead, be sure to back up your Mac and clean it up using Mac maintenance software like CleanMyMac X.